Freakoscope
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Contents |
Introduction
Fre(a)koscope is an FFT-based real-time spectrum analyzer featuring: lin/log/semitones/third-octave/Bark scales
- window size selection
- frequency zooming
- freeze
- peak hold
- cursor information (amplitude+frequency)
Parameters
Screenshots
linear frequency scale
logarithmic frequency scale
semitones
3rd octave
FAQ, troobleshootings
Please can you tell me what the Window size knob does? It seems to change the appearance of the waveform dramatically, while the axes remain unchanged.
When you increase the window size you increase the frequency resolution, i.e. the capacity to distinguish between 2 close sinusoidal components. Think about images at few or lots of pixel. But at the same time you lose in time resolution, i.e. the dynamic spectrum evolution seems to be slowed down and you'll miss fast transients. Tweaking this parameter is mainly about how choosing this trade-off according the sound material you are wieving, usually with trial and error. to give you some numerical landmarks, 1024 or 2048 points are common window sizes that give you both responsiveness and frequency resolution. 128 or 256 points are better for fast attacks while 4096 and more points are good for sustained rich harmonic textures like chords, drones...
